Process for printing transfers



March 7, 1933. C, A COLOMBO 1,900,635

PROCESS FOR PRINTING TRANSFERS Filed April 27, 1951 colour on the cose, without, however,

Patented Mar. 7, 19,33

UNITED STATES PATENT OFFICE GARLO ALBINI-COLOMBO, 0F MILAN, ITALY, ASSIGNOR T0 SOC. ITAL. TRANSFERS ALBIN I, S. I. T. A., 0F MILAN, ITALY rnocnss Fon PRINTING TnANsFEns Application :Bled April 27, 1981, Serial No. 533,366, and in Italy April 29,

long time and can be placed at any moment upon a porous surface by the combined action of pressure and heat.

The colours of the transfer penetrate deeply into the porous surface giving at the same time a clear design without spreading.

The preparation or printing` of the transfers is eifected by means of lithographie and typographie machines on any paper either prepared or'not.

The preparation of the inks or colours necessary for printing is effected as follows:

I melt in a suitable container 100e parts of tallow and 100 parts of colophon preferably of best quality. The word tallow as used throughout the specication and claims refers to the common meaning of the word, namely the tallow obtained from animals such as cattle, sheep and the like. The quantity of colophony employed varies according to the period of the year, i. e. I employ a larger quantity in the warm months than in the colder ones. I thus obtain a sufciently thick mass which can, however, be thinned like normal lithographie colours. The density of this paste can be reduced, if necessary, by the addition of one or more parts of wax and one or more partsv of gluexceeding'a limit as would prevent a satisfactory printing. The mass thus obtained is mixed with any suitable lithographic ink in variable proportions according to the density of the colour to be obtained, and the ink resulting therefrom will give most satisfactory results.

similar result can be obtained by melting the colours with the mass during the preparation of this latter, whereby the colour ready for printing is obtained.

After having prepared the ink or printing palette in the manner above described, before introducing it into the ink reservoir of the printing machine, it is advisable to incorporate with the colour a suficient quantity of colophony or other gum y which has been previously finely ground, as

the print will be more brilliant and clear. The ink acquires a granular aspect and the print will be sticky.

A still better result is obtained, by dusting over the impression, immediately after print, with powdered colophony or other finely ground resinous gum.

The transfers thus obtained can be placed in an indelible manner upon `a porous surface, on which the impression will be perfectly clear, brilliantl and well-outlined.

The transfers according to this invention do not stilfen the fabric on which theyare placed and do not crack.

According to this invention the impression is conveniently transferred by rolling between two rolls the surface on which the impression is to'be placed against the transfer, one of said rolls being driven while the other is loose and pressed against the former and heated by suitable means.

The annexed drawing shows one way of carrying out the inventlon.

Referring to the drawing, 1 denotes the support. of paper and 2 the layer representing the design or the like obtained by lithographic printing using the ink prepared as above described.

'What I claim is:

Process for preparing transfers adapted to be placed upon porous material, consisting in melting together tallow and colophony in equal parts, in adding to the mass resulting therefrom wax and glucose in order to obtain the desired density, in adding said mass CARLO ALBI I COLOMBO. 

